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翅果油树叶片中生物碱酶法提取、分离表征及化感研究
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摘要
翅果油树为我国二级珍稀濒危保护植物,其种子和叶片中富含多种营养成分,现已在保健和医药领域被相继开发利用,为进一步揭示其所含生物活性成分的组成及活性,本研究以翅果油树叶片为试材,对其所含生物碱的酶法提取条件、组分组成以及对4种供试植物的化感作用进行了研究,主要研究结果如下:
     (1)以生物碱得率为考察指标,在单因素实验和响应面实验的基础上确定了翅果油树叶片生物碱酶法提取的最佳工艺条件:酶用量7.5mg/g、酶解时间3h、pH4.3、酶解温度51℃,影响提取效果的四种因素中以pH值对生物碱的提取得率影响最大;
     (2)对酚性叔胺生物碱采用TLC分析,结果表明:正己烷:丙酮:二乙胺为4:1:1作为展开剂得到组分Ⅰ_α。通过特征显色反应鉴定,组分Ⅰ_α有生物碱的特征显色反应。此外,经红外光谱对Ⅰ_α分析显示:Ⅰ_α含有生物碱类化合物的典型特征吸收峰,Ⅰ_α的高效液相色谱分析可知生物碱组分Ⅰ_α含有的绝大部分物质为峰3所代表的物质。
     (3)试验研究了生物碱提取液对4种植物种子萌发、幼苗生长及生理生化性状的影响。结果表明空心菜种子萌发和幼苗生长指标均受到较强的抑制作用,并且随提取液浓度升高,抑制作用增强;对大豆、黄瓜和绿豆的化感效应则表现出低浓度促进而高浓度抑制的双重浓度效应。在生物碱提取液对4种供试植物的生理生化研究中可知空心菜幼苗中SOD、POD、CAT与对照组相比均呈现显著的下降趋势,而大豆、绿豆、黄瓜则呈现先上升后下降的趋势。
Elaeagnus mollis diels belong to elaeagnus of Elaeagnaceae, thatis rich in a variety of nutrition contents in leaves, furthermore,elaeagnus has already been exploited and used in the area of healthand medicament. This paper studies which the ingredient of bioactivecompounds and activities it have. Regard Elaeagnus mollis leaves asthe research object, enzyme assisted extraction process,purification process, identification and antioxidant activity of theflavonoids in Elaeagnus mollis leaves were studied in this thesis.The results are as follows:
     (1) The studing regarded alkaloids yield as investigates index.According to single factor and response surface methodologyexperiments, the research conditions were found. The optimumdosage of enzymatic hydrolysis 7.5mg/g, time 3h, pH value 4.3,temperature 51℃. In this four factors, the greatest impact is pHvalue.
     (2) One constituentⅠ_α, which of the alkaloids were separated bythe way of silica gel column chromatography and TLC. This researchanalysed componentⅠ_αmay contain cyclopeptide alkaloid by colorreaction preliminarily. In addition, the infrared spectrum toⅠ_αanalysis shows thatⅠ_αcontain alkaloids compounds of typicalcharacteristics of absorption peaks,Ⅰ_αhigh-performance liquidchromatography analysis alkaloid components thatⅠ_αcontains mostof the material for peak three represents the material.
     (3) Studied the alkaloids extracted liquid of 4 kinds of plant seedgermination, seedling growth and physiological and biochemicalproperties influence. The results show that handline cucumisgermination and seedling growth indexes are strong inhibition, andwith the concentration increases, inhibition strengthened; Forsoybeans, cucumbers and beans, the result show low concentrationand high concentration of inhibition to promote doubleconcentration effect. In biological extraction of 4 kinds of plantswere the physiological and biochemical research reveals thehandline cucumis melo seedlings of SOD and POD and CATcompared with the control are significantly significant lowering ofthe trend, and soy beans, green beans, cucumber revealed after thefirst of the decline of the trend up.
引文
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